Recent content by Valayar

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    High School How does the weight distribution work in a human pyramid?

    This seems to be a problem related to Newton's Third Law. You cannot apply this law the way you like it. Of course you can add vectors the way you want (using vector field's rules), but forces need an application point (I'm not sure it's the right expression, English is my second langage) This...
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    Graduate How Can dx and dy Be Manipulated in Differential Equations and Integrals?

    Arildno : why is this true ?
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    Undergrad Are E and B Fields Always Perpendicular?

    Hello, Is it always true that (E|B) = 0 ? If the answer is "no". In which cases is it true ? Thank you !
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    Have You Ever Heard of a Mental Boost Through Habitual Actions?

    I don't think that's an illness. As long as you know what's real and what is not, and that you do behave like any other person when you don't drum, then there is probably nothing to worry about... However, seeing a doctor (a specialist) might be a good idea. He'll give you a professional...
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    High School Iq 130+ simple but confusing brain teaser.

    I'd say 100 $. Here is my explanation : Suppose the ring is exactly 100 $. Going to plastry shop to exchange the voucher would be useless (has he wouldn't have to give any cash back), but let's do it : he exchanges the voucher for cash, and afterwards the plastry shop owner comes back and...